Search Publications
The relationship between star formation activity and galaxy structural properties in CANDELS and a semi-analytic model
Barro, Guillermo; Bell, Eric F.; Ferguson, Henry C. +13 more
We study the correlation of galaxy structural properties with their location relative to the SFR-M* correlation, also known as the star formation `star-forming main sequence' (SFMS), in the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey and Galaxy and Mass Assembly Survey and in a semi-analytic model (SAM) of galaxy form…
CoMaLit - V. Mass forecasting with proxies: method and application to weak lensing calibrated samples
Sereno, Mauro; Ettori, Stefano
Mass measurements of astronomical objects are most wanted but still elusive. We need them to trace the formation and evolution of cosmic structure but we can get direct measurements only for a minority. This lack can be circumvented with a proxy and a scaling relation. The twofold goal of estimating the unbiased relation and finding the right prox…
Supernova progenitors, their variability and the Type IIP Supernova ASASSN-16fq in M66
Kochanek, C. S.; Stanek, K. Z.; Dong, Subo +10 more
We identify a pre-explosion counterpart to the nearby Type IIP supernova ASASSN-16fq (SN 2016cok) in archival Hubble Space Telescope data. The source appears to be a blend of several stars that prevents obtaining accurate photometry. However, with reasonable assumptions about the stellar temperature and extinction, the progenitor almost certainly …
Super-Eddington QSO RX J0439.6-5311 - I. Origin of the soft X-ray excess and structure of the inner accretion flow
Done, Chris; Ward, Martin; Jin, Chichuan
We report the results from a recent 133 ks XMM-Newton observation of a highly super-Eddington narrow-line Type-1 quasi-stellar object RX J0439.6-5311. This source has one of the steepest active galactic nuclei hard X-ray slopes, in addition to a prominent and smooth soft X-ray excess. Strong variations are found throughout the 0.3-10 keV energy ra…
CLASH: accurate photometric redshifts with 14 HST bands in massive galaxy cluster cores
Infante, L.; Zheng, W.; Molino, A. +41 more
We present accurate photometric redshifts for galaxies observed by the Cluster Lensing And Supernova survey with Hubble (CLASH). CLASH observed 25 massive galaxy cluster cores with the Hubble Space Telescope in 16 filters spanning 0.2-1.7 µm. Photometry in such crowded fields is challenging. Compared to our previously released catalogues, we…
The JCMT Plane Survey: first complete data release - emission maps and compact source catalogue
Martin, P. G.; White, G. J.; Moore, T. J. T. +42 more
We present the first data release of the James Clerk Maxwell Telescope Plane Survey (JPS), the JPS Public Release 1. JPS is an 850-µm continuum survey of six fields in the northern inner Galactic plane in a longitude range of ℓ = 7°-63°, made with the Submillimetre Common-User Bolometer Array 2. This first data release consists of emission m…
Observational consequences of optical band milliarcsec-scale structure in active galactic nuclei discovered by Gaia
Petrov, L.; Kovalev, Y. Y.
We interpret the recent discovery of a preferred very long baseline interferometry (VLBI)/Gaia offset direction for radio-loud active galactic nuclei (AGNs) along pc-scale radio jets as a manifestation of their optical structure on scales of 1-100 milliarcsec (mas). The extended jet structure affects the Gaia position more strongly than the VLBI p…
The Lyman continuum escape and ISM properties in Tololo 1247-232 - new insights from HST and VLA★
Östlin, G.; Hayes, M.; Zackrisson, E. +7 more
Low- and intermediate-mass galaxies are widely discussed as cause of reionization at redshift z ∼ 10-6. However, observational proof of galaxies that are leaking ionizing radiation (Lyman continuum; LyC) is a currently ongoing challenge and the list of LyC emitting candidates is still short. Tololo 1247-232 is among those very few galaxies with re…
A detection of wobbling brightest cluster galaxies within massive galaxy clusters
Kneib, J. P.; Harvey, David; Courbin, F. +1 more
A striking signal of dark matter beyond the standard model is the existence of cores in the centre of galaxy clusters. Recent simulations predict that a brightest cluster galaxy (BCG) inside a cored galaxy cluster will exhibit residual wobbling due to previous major mergers, long after the relaxation of the overall cluster. This phenomenon is abse…
The Clouds are breaking: tracing the Magellanic system with Gaia DR1 Mira variables
Erkal, Denis; Belokurov, Vasily; Mackey, Dougal +2 more
We exploit the first data release from the Gaia mission to identify candidate Mira variables in the outskirts of the Magellanic Clouds. The repeated observations of sources during the initial phase of the Gaia mission is used to identify stars that show signs of variability. This variability information, combined with infrared photometry from Two …